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Research interests

My research focuses on the ecological and evolutionary processes that shape the spatial and temporal patterns of variation found in natural populations. On a conceptual level I want to combine our understanding of microevolutionary processes such as selection, genetic structure of populations, and gene flow, with the ecological processes of age structure, recruitment, dispersal, and dormancy. I have begun this work on life history variation by integrating studies of selection and demography to explain the coexistence of two life history types within populations of a short lived plant, Campanula americana . I used a matrix population model to quantify the contribution of winter annuals and biennials to the population growth rate and to evaluate the role of the soil seed bank .

My general approach to research involves combining field work in natural populations with greenhouse experiments and mathematical modeling. My current research is on the comparative demography of four native Australian species of Trachymene (Apiaceae) with life history types which include: annual, biennial or perennial. The projects which I have recently supervised include:

The population biology, canopy seed bank dynamics and early seedling growth characteristics of two gymnosperm species: Callitris muelleri and Callitris rhomboidea.

The distribution of four Banksia species in relation to a soil moisture gradient.

The population biology and reproductive ecology of a rare and endangered species, Trachymene scapigera.

I am interested in supervising students who want to combine experimental and field based studies of native Australian plants or projects that combine a theoretical and an empirical approach to plant ecology or evolution.

2010

Dynamic networks in a patchy landscape: will species interactions adjust to increased climatic extremes; Dickman C, Wardle G; Australian Research Council (ARC)/Discovery Projects (DP).

2007

Biodiversity enhancement in arid Australia: the importance of micro-refugia and biotic interactions; Dickman C, Wardle G; Australian Research Council (ARC)/Discovery Projects (DP).

2004

Boom & bust: the role of fire & rain in driving the dynamics of seeds & rodents in arid Australia; Dickman C, Wardle G; Australian Research Council (ARC)/Discovery Projects (DP).

2003

Pollination in an endangered ecological community nocturnal and diurnal pollinators of native parsnips at the Agnes Banks Woodland; Wardle G, Davila Y; Royal Zoological Society of New South Wales/Research Grant.

The effect of geographical variation in pollinators and an introduced pollinator on genetic diversity in a native herb Trachymeme incisa (Apiaceae); Wardle G; Australian Federation of University Women/Research Grant.

Divljan, A., Parry-Jones, K., Wardle, G. (2011). One hundred and forty days in the life of a flyingfox tooth-fairy: Estimating the age of pups using tooth eruption and replacement. Symposium on the Biology and Conservation of Australasian Bats, Mosman: Royal Zoological Society of New South Wales.

Divljan, A., Parry-Jones, K., Griffith, M., Whitney, J., Burton, N., Smith, C., Wardle, G. (2011). Practical solutions for capturing and processing Grey-headed Flying-foxes, Pteropus poliocephalus, based on a camp study at the Royal Botanic Gardens, Sydney. Symposium on the Biology and Conservation of Australasian Bats, Mosman: Royal Zoological Society of New South Wales.

Divljan, A., Parry-Jones, K., Wardle, G. (2011). One hundred and forty days in the life of a flyingfox tooth-fairy: Estimating the age of pups using tooth eruption and replacement. Symposium on the Biology and Conservation of Australasian Bats, Mosman: Royal Zoological Society of New South Wales.

Divljan, A., Parry-Jones, K., Griffith, M., Whitney, J., Burton, N., Smith, C., Wardle, G. (2011). Practical solutions for capturing and processing Grey-headed Flying-foxes, Pteropus poliocephalus, based on a camp study at the Royal Botanic Gardens, Sydney. Symposium on the Biology and Conservation of Australasian Bats, Mosman: Royal Zoological Society of New South Wales.